I think arguing canon on set is one thing, I think enjoying the work and understanding it from the start is another.

He wasn't into Star Trek, he said he was after being paid to be into it. Thats it - and honestly I don't believe he liked it in his rewatch either - and that is the issue. He wasn't interested in making a Star Trek movie. He got brought on because "BIG NAME MEAN BIG $$$" and not because it would be good for Star Trek. imo of course.